Tham khảo tài liệu 'studies on water management issuese part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 90 Studies on Water Management Issues SnOiOGo s w 18 30 0 E 18 40 0 E 18 50 0 E 18 30 0 E 18 40 0 E 18 50 0 E Fig. 6. Areal distribution map of electrical conductivity in pS cm in the Cape Flats Adelana et al. 2010 SnOiOGo S 91 Changes in Groundwater Level Dynamics in Aquifer Systems -Implications for Resource Management in a Semi-Arid Climate In 1998 new groundwater management arrangements were put in place to maximise development opportunities in the Werribee Irrigation District yet ensure that groundwater resources are managed in a sustainable way. Management arrangements include Groundwater Management Areas GMAs Groundwater Supply Protection Areas GSPAs and Groundwater Management Plans SRWA 2006 . Water restrictions have since been in place and at different stages of restriction they are periodically reviewed. For example in March 2011 Southern Rural Water announced a substantial boost in groundwater allocation for landowners in the Deutgam Water Supply Protection Area based around Werribee. A full ban on groundwater use in Werribee was introduced in 2006 because of the threat of seawater intrusion into the groundwater through aquifer from Port Phillip Bay SRWA 2006 . SRWA announced a partial lifting to 25 allocation in early January 2011 and recommended to the Minister a lifting to 75 after careful monitoring showed the aquifer is continuing to improve SRWA 2011 . More than average mean rainfall over the last 12 months has seen groundwater levels rising and salinity levels improving. All bores can now be used for stock and domestic purposes. Currently the Department of Water Affairs Cape Town regional office is capacity-constrained which limits its ability to continue groundwater monitoring and the processing of licence applications Colvin Saayman 2007 . In such a situation very little additional management of groundwater resources is possible. However by the year 2012 DWA aims to complete institutional .
